Research On Centralized Wireless Mesh Network Architecture And Handoff Technology

The Wireless Mesh Network combines with the advantages of WLAN and Ad Hoc,and has the advantages of easy installation,non-line-of-sight transmission,high robustness,flexible structure and high bandwidth.It has become an effective way to solve the problem of broadband access.With the rapid development of mobile Internet and the rapid growth of the number of users,the resulting massive data on the wireless network had a new requirement.The shortcomings of traditional Wireless Mesh Network are gradually exposed: for example,complexity,inefficiency,closeness,throughput limitation,and signal interference.This also presents a new challenge for Wireless Mesh Network: how to manage a large number of users,how to improve the utilization of wireless resources,and how to complete the mobile user switching,etc.Therefore,in the current research work,how to combine the characteristics of Wireless Mesh Network,and designning efficient Wireless Mesh Network to deal with these new challenges is necessary.Firstly,this thesis research on the architecture of the Wireless Mesh Network.According to the development trend of wireless network,a centralized Wireless Mesh Network architecture MPP-AC based on controller AC is proposed.The architecture is to increase the AC on the MPP device,AC to achieve the network management and control functions,MAP and MP devices only for data forwarding,simplify network equipment functions.This centralized control can effectively increase the scalability of the network and achieve load balancing.Secondly,this thesis focuses on the hierarchical routing protocol in the wireless network,and proposes a hierarchical routing protocol MAP-ICC based on the wireless node's MAP of the Wireless Mesh Network.MAP-ICC protocol to distinguish between node types and energy consumption based on the MAP node "independent cluster",the cluster head node is responsible for the cluster of data fusion and forwarding.Through the simulation analysis,the proposed MAP-ICC protocol is better than the LEACH and HWMP protocols in terms of network lifetime,data packet transmission success rate and routing load.Finally,this thesie improves the routing handoff in IEEE802.11 s,increases the movement trend and the received signal strength of the mobile node as the route handoff metric.Through the simulation analysis,the improved routing handoff strategy can reduce the network handoff delay and packet loss rate.